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CS42324 数据表(PDF) 53 Page - Cirrus Logic |
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CS42324 数据表(HTML) 53 Page - Cirrus Logic |
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53 / 71 page ![]() DS721A6 53 CS42324 6.9.3 Analog Input Selection These bits are used to select the input source for the ADC. 6.10 DAC1 Control (Address 0Bh) 6.10.1 DAC1 De-Emphasis Control This bit enables the digital filter to apply the standard 15μs/50μs digital de-emphasis filter response for a sample rate (Fs) of 44.1 kHz. De-emphasis is available only in Single-Speed Mode. 6.10.2 DAC1 Single Volume Control The individual channel volume levels are independently controlled by their respective Volume Control reg- isters when this function is disabled. When enabled, the volume on DAC1 channels is determined by the DAC1A Volume Control register and the DAC1B Volume Control register is ignored. 6.10.3 DAC1 Soft Ramp Control Soft Ramp allows level changes, both muting and attenuation, to be implemented by incrementally ramp- ing, in 1/8 dB steps, from the current level to the new level at a rate of 1 dB per 8 left/right clock periods. ADC_SOFT ADC Soft Ramp Control 0 Off 1On AIN_SEL[2:0] ADC Soft Ramp Control 000 Reserved 001 Line-Level Input Pair 1 010 Line-Level Input Pair 2 011 Line-Level Input Pair 3 100 Line-Level Input Pair 4 101 Line-Level Input Pair 5 110 Reserved 111 Reserved 7 6 5 432 10 DAC1_DEPH DAC1_SNGV OL DAC1_SOFT DAC1_ZC DAC1_ LOOPBACK DAC1_INV DAC1_MIX1 DAC1_MIX0 DAC1_DEPH DAC1 De-Emphasis Control 0 Off 1 On (valid for Fs = 44.1 kHz) DAC1_SNGVOL DAC1 Single Volume Control 0 Off 1On DAC1_SOFT DAC1 Soft Ramp Control 0Off 1 On |
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